1 /* 2 * Marvell Wireless LAN device driver: scan ioctl and command handling 3 * 4 * Copyright (C) 2011-2014, Marvell International Ltd. 5 * 6 * This software file (the "File") is distributed by Marvell International 7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 17 * this warranty disclaimer. 18 */ 19 20 #include "decl.h" 21 #include "ioctl.h" 22 #include "util.h" 23 #include "fw.h" 24 #include "main.h" 25 #include "11n.h" 26 #include "cfg80211.h" 27 28 /* The maximum number of channels the firmware can scan per command */ 29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14 30 31 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4 32 33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */ 34 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \ 35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \ 36 *sizeof(struct mwifiex_chan_scan_param_set))) 37 38 /* Memory needed to store supported rate */ 39 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \ 40 + HOSTCMD_SUPPORTED_RATES) 41 42 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware 43 scan */ 44 #define WILDCARD_SSID_TLV_MAX_SIZE \ 45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \ 46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \ 47 + IEEE80211_MAX_SSID_LEN)) 48 49 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */ 50 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \ 51 + sizeof(struct mwifiex_ie_types_num_probes) \ 52 + sizeof(struct mwifiex_ie_types_htcap) \ 53 + CHAN_TLV_MAX_SIZE \ 54 + RATE_TLV_MAX_SIZE \ 55 + WILDCARD_SSID_TLV_MAX_SIZE) 56 57 58 union mwifiex_scan_cmd_config_tlv { 59 /* Scan configuration (variable length) */ 60 struct mwifiex_scan_cmd_config config; 61 /* Max allocated block */ 62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC]; 63 }; 64 65 enum cipher_suite { 66 CIPHER_SUITE_TKIP, 67 CIPHER_SUITE_CCMP, 68 CIPHER_SUITE_MAX 69 }; 70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { 71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ 72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ 73 }; 74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { 75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ 76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ 77 }; 78 79 static void 80 _dbg_security_flags(int log_level, const char *func, const char *desc, 81 struct mwifiex_private *priv, 82 struct mwifiex_bssdescriptor *bss_desc) 83 { 84 _mwifiex_dbg(priv->adapter, log_level, 85 "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n", 86 func, desc, 87 bss_desc->bcn_wpa_ie ? 88 bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0, 89 bss_desc->bcn_rsn_ie ? 90 bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0, 91 priv->sec_info.wep_enabled ? "e" : "d", 92 priv->sec_info.wpa_enabled ? "e" : "d", 93 priv->sec_info.wpa2_enabled ? "e" : "d", 94 priv->sec_info.encryption_mode, 95 bss_desc->privacy); 96 } 97 #define dbg_security_flags(mask, desc, priv, bss_desc) \ 98 _dbg_security_flags(MWIFIEX_DBG_##mask, desc, __func__, priv, bss_desc) 99 100 static bool 101 has_ieee_hdr(struct ieee_types_generic *ie, u8 key) 102 { 103 return (ie && ie->ieee_hdr.element_id == key); 104 } 105 106 static bool 107 has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key) 108 { 109 return (ie && ie->vend_hdr.element_id == key); 110 } 111 112 /* 113 * This function parses a given IE for a given OUI. 114 * 115 * This is used to parse a WPA/RSN IE to find if it has 116 * a given oui in PTK. 117 */ 118 static u8 119 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) 120 { 121 u8 count; 122 123 count = iebody->ptk_cnt[0]; 124 125 /* There could be multiple OUIs for PTK hence 126 1) Take the length. 127 2) Check all the OUIs for AES. 128 3) If one of them is AES then pass success. */ 129 while (count) { 130 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) 131 return MWIFIEX_OUI_PRESENT; 132 133 --count; 134 if (count) 135 iebody = (struct ie_body *) ((u8 *) iebody + 136 sizeof(iebody->ptk_body)); 137 } 138 139 pr_debug("info: %s: OUI is not found in PTK\n", __func__); 140 return MWIFIEX_OUI_NOT_PRESENT; 141 } 142 143 /* 144 * This function checks if a given OUI is present in a RSN IE. 145 * 146 * The function first checks if a RSN IE is present or not in the 147 * BSS descriptor. It tries to locate the OUI only if such an IE is 148 * present. 149 */ 150 static u8 151 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 152 { 153 u8 *oui; 154 struct ie_body *iebody; 155 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 156 157 if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 158 iebody = (struct ie_body *) 159 (((u8 *) bss_desc->bcn_rsn_ie->data) + 160 RSN_GTK_OUI_OFFSET); 161 oui = &mwifiex_rsn_oui[cipher][0]; 162 ret = mwifiex_search_oui_in_ie(iebody, oui); 163 if (ret) 164 return ret; 165 } 166 return ret; 167 } 168 169 /* 170 * This function checks if a given OUI is present in a WPA IE. 171 * 172 * The function first checks if a WPA IE is present or not in the 173 * BSS descriptor. It tries to locate the OUI only if such an IE is 174 * present. 175 */ 176 static u8 177 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 178 { 179 u8 *oui; 180 struct ie_body *iebody; 181 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 182 183 if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) { 184 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data; 185 oui = &mwifiex_wpa_oui[cipher][0]; 186 ret = mwifiex_search_oui_in_ie(iebody, oui); 187 if (ret) 188 return ret; 189 } 190 return ret; 191 } 192 193 /* 194 * This function compares two SSIDs and checks if they match. 195 */ 196 s32 197 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2) 198 { 199 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) 200 return -1; 201 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); 202 } 203 204 /* 205 * This function checks if wapi is enabled in driver and scanned network is 206 * compatible with it. 207 */ 208 static bool 209 mwifiex_is_bss_wapi(struct mwifiex_private *priv, 210 struct mwifiex_bssdescriptor *bss_desc) 211 { 212 if (priv->sec_info.wapi_enabled && 213 has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY)) 214 return true; 215 return false; 216 } 217 218 /* 219 * This function checks if driver is configured with no security mode and 220 * scanned network is compatible with it. 221 */ 222 static bool 223 mwifiex_is_bss_no_sec(struct mwifiex_private *priv, 224 struct mwifiex_bssdescriptor *bss_desc) 225 { 226 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 227 !priv->sec_info.wpa2_enabled && 228 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 229 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 230 !priv->sec_info.encryption_mode && !bss_desc->privacy) { 231 return true; 232 } 233 return false; 234 } 235 236 /* 237 * This function checks if static WEP is enabled in driver and scanned network 238 * is compatible with it. 239 */ 240 static bool 241 mwifiex_is_bss_static_wep(struct mwifiex_private *priv, 242 struct mwifiex_bssdescriptor *bss_desc) 243 { 244 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 245 !priv->sec_info.wpa2_enabled && bss_desc->privacy) { 246 return true; 247 } 248 return false; 249 } 250 251 /* 252 * This function checks if wpa is enabled in driver and scanned network is 253 * compatible with it. 254 */ 255 static bool 256 mwifiex_is_bss_wpa(struct mwifiex_private *priv, 257 struct mwifiex_bssdescriptor *bss_desc) 258 { 259 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled && 260 !priv->sec_info.wpa2_enabled && 261 has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) 262 /* 263 * Privacy bit may NOT be set in some APs like 264 * LinkSys WRT54G && bss_desc->privacy 265 */ 266 ) { 267 dbg_security_flags(INFO, "WPA", priv, bss_desc); 268 return true; 269 } 270 return false; 271 } 272 273 /* 274 * This function checks if wpa2 is enabled in driver and scanned network is 275 * compatible with it. 276 */ 277 static bool 278 mwifiex_is_bss_wpa2(struct mwifiex_private *priv, 279 struct mwifiex_bssdescriptor *bss_desc) 280 { 281 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 282 priv->sec_info.wpa2_enabled && 283 has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 284 /* 285 * Privacy bit may NOT be set in some APs like 286 * LinkSys WRT54G && bss_desc->privacy 287 */ 288 dbg_security_flags(INFO, "WAP2", priv, bss_desc); 289 return true; 290 } 291 return false; 292 } 293 294 /* 295 * This function checks if adhoc AES is enabled in driver and scanned network is 296 * compatible with it. 297 */ 298 static bool 299 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv, 300 struct mwifiex_bssdescriptor *bss_desc) 301 { 302 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 303 !priv->sec_info.wpa2_enabled && 304 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 305 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 306 !priv->sec_info.encryption_mode && bss_desc->privacy) { 307 return true; 308 } 309 return false; 310 } 311 312 /* 313 * This function checks if dynamic WEP is enabled in driver and scanned network 314 * is compatible with it. 315 */ 316 static bool 317 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv, 318 struct mwifiex_bssdescriptor *bss_desc) 319 { 320 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 321 !priv->sec_info.wpa2_enabled && 322 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 323 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 324 priv->sec_info.encryption_mode && bss_desc->privacy) { 325 dbg_security_flags(INFO, "dynamic", priv, bss_desc); 326 return true; 327 } 328 return false; 329 } 330 331 /* 332 * This function checks if a scanned network is compatible with the driver 333 * settings. 334 * 335 * WEP WPA WPA2 ad-hoc encrypt Network 336 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible 337 * 0 0 0 0 NONE 0 0 0 yes No security 338 * 0 1 0 0 x 1x 1 x yes WPA (disable 339 * HT if no AES) 340 * 0 0 1 0 x 1x x 1 yes WPA2 (disable 341 * HT if no AES) 342 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES 343 * 1 0 0 0 NONE 1 0 0 yes Static WEP 344 * (disable HT) 345 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP 346 * 347 * Compatibility is not matched while roaming, except for mode. 348 */ 349 static s32 350 mwifiex_is_network_compatible(struct mwifiex_private *priv, 351 struct mwifiex_bssdescriptor *bss_desc, u32 mode) 352 { 353 struct mwifiex_adapter *adapter = priv->adapter; 354 355 bss_desc->disable_11n = false; 356 357 /* Don't check for compatibility if roaming */ 358 if (priv->media_connected && 359 (priv->bss_mode == NL80211_IFTYPE_STATION) && 360 (bss_desc->bss_mode == NL80211_IFTYPE_STATION)) 361 return 0; 362 363 if (priv->wps.session_enable) { 364 mwifiex_dbg(adapter, IOCTL, 365 "info: return success directly in WPS period\n"); 366 return 0; 367 } 368 369 if (bss_desc->chan_sw_ie_present) { 370 mwifiex_dbg(adapter, INFO, 371 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n"); 372 return -1; 373 } 374 375 if (mwifiex_is_bss_wapi(priv, bss_desc)) { 376 mwifiex_dbg(adapter, INFO, 377 "info: return success for WAPI AP\n"); 378 return 0; 379 } 380 381 if (bss_desc->bss_mode == mode) { 382 if (mwifiex_is_bss_no_sec(priv, bss_desc)) { 383 /* No security */ 384 return 0; 385 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) { 386 /* Static WEP enabled */ 387 mwifiex_dbg(adapter, INFO, 388 "info: Disable 11n in WEP mode.\n"); 389 bss_desc->disable_11n = true; 390 return 0; 391 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) { 392 /* WPA enabled */ 393 if (((priv->adapter->config_bands & BAND_GN || 394 priv->adapter->config_bands & BAND_AN) && 395 bss_desc->bcn_ht_cap) && 396 !mwifiex_is_wpa_oui_present(bss_desc, 397 CIPHER_SUITE_CCMP)) { 398 399 if (mwifiex_is_wpa_oui_present 400 (bss_desc, CIPHER_SUITE_TKIP)) { 401 mwifiex_dbg(adapter, INFO, 402 "info: Disable 11n if AES\t" 403 "is not supported by AP\n"); 404 bss_desc->disable_11n = true; 405 } else { 406 return -1; 407 } 408 } 409 return 0; 410 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) { 411 /* WPA2 enabled */ 412 if (((priv->adapter->config_bands & BAND_GN || 413 priv->adapter->config_bands & BAND_AN) && 414 bss_desc->bcn_ht_cap) && 415 !mwifiex_is_rsn_oui_present(bss_desc, 416 CIPHER_SUITE_CCMP)) { 417 418 if (mwifiex_is_rsn_oui_present 419 (bss_desc, CIPHER_SUITE_TKIP)) { 420 mwifiex_dbg(adapter, INFO, 421 "info: Disable 11n if AES\t" 422 "is not supported by AP\n"); 423 bss_desc->disable_11n = true; 424 } else { 425 return -1; 426 } 427 } 428 return 0; 429 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) { 430 /* Ad-hoc AES enabled */ 431 return 0; 432 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) { 433 /* Dynamic WEP enabled */ 434 return 0; 435 } 436 437 /* Security doesn't match */ 438 dbg_security_flags(ERROR, "failed", priv, bss_desc); 439 return -1; 440 } 441 442 /* Mode doesn't match */ 443 return -1; 444 } 445 446 /* 447 * This function creates a channel list for the driver to scan, based 448 * on region/band information. 449 * 450 * This routine is used for any scan that is not provided with a 451 * specific channel list to scan. 452 */ 453 static int 454 mwifiex_scan_create_channel_list(struct mwifiex_private *priv, 455 const struct mwifiex_user_scan_cfg 456 *user_scan_in, 457 struct mwifiex_chan_scan_param_set 458 *scan_chan_list, 459 u8 filtered_scan) 460 { 461 enum nl80211_band band; 462 struct ieee80211_supported_band *sband; 463 struct ieee80211_channel *ch; 464 struct mwifiex_adapter *adapter = priv->adapter; 465 int chan_idx = 0, i; 466 467 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) { 468 469 if (!priv->wdev.wiphy->bands[band]) 470 continue; 471 472 sband = priv->wdev.wiphy->bands[band]; 473 474 for (i = 0; (i < sband->n_channels) ; i++) { 475 ch = &sband->channels[i]; 476 if (ch->flags & IEEE80211_CHAN_DISABLED) 477 continue; 478 scan_chan_list[chan_idx].radio_type = band; 479 480 if (user_scan_in && 481 user_scan_in->chan_list[0].scan_time) 482 scan_chan_list[chan_idx].max_scan_time = 483 cpu_to_le16((u16) user_scan_in-> 484 chan_list[0].scan_time); 485 else if ((ch->flags & IEEE80211_CHAN_NO_IR) || 486 (ch->flags & IEEE80211_CHAN_RADAR)) 487 scan_chan_list[chan_idx].max_scan_time = 488 cpu_to_le16(adapter->passive_scan_time); 489 else 490 scan_chan_list[chan_idx].max_scan_time = 491 cpu_to_le16(adapter->active_scan_time); 492 493 if (ch->flags & IEEE80211_CHAN_NO_IR) 494 scan_chan_list[chan_idx].chan_scan_mode_bitmap 495 |= (MWIFIEX_PASSIVE_SCAN | 496 MWIFIEX_HIDDEN_SSID_REPORT); 497 else 498 scan_chan_list[chan_idx].chan_scan_mode_bitmap 499 &= ~MWIFIEX_PASSIVE_SCAN; 500 scan_chan_list[chan_idx].chan_number = 501 (u32) ch->hw_value; 502 503 scan_chan_list[chan_idx].chan_scan_mode_bitmap 504 |= MWIFIEX_DISABLE_CHAN_FILT; 505 506 if (filtered_scan && 507 !((ch->flags & IEEE80211_CHAN_NO_IR) || 508 (ch->flags & IEEE80211_CHAN_RADAR))) 509 scan_chan_list[chan_idx].max_scan_time = 510 cpu_to_le16(adapter->specific_scan_time); 511 512 chan_idx++; 513 } 514 515 } 516 return chan_idx; 517 } 518 519 /* This function creates a channel list tlv for bgscan config, based 520 * on region/band information. 521 */ 522 static int 523 mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv, 524 const struct mwifiex_bg_scan_cfg 525 *bgscan_cfg_in, 526 struct mwifiex_chan_scan_param_set 527 *scan_chan_list) 528 { 529 enum nl80211_band band; 530 struct ieee80211_supported_band *sband; 531 struct ieee80211_channel *ch; 532 struct mwifiex_adapter *adapter = priv->adapter; 533 int chan_idx = 0, i; 534 535 for (band = 0; (band < NUM_NL80211_BANDS); band++) { 536 if (!priv->wdev.wiphy->bands[band]) 537 continue; 538 539 sband = priv->wdev.wiphy->bands[band]; 540 541 for (i = 0; (i < sband->n_channels) ; i++) { 542 ch = &sband->channels[i]; 543 if (ch->flags & IEEE80211_CHAN_DISABLED) 544 continue; 545 scan_chan_list[chan_idx].radio_type = band; 546 547 if (bgscan_cfg_in->chan_list[0].scan_time) 548 scan_chan_list[chan_idx].max_scan_time = 549 cpu_to_le16((u16)bgscan_cfg_in-> 550 chan_list[0].scan_time); 551 else if (ch->flags & IEEE80211_CHAN_NO_IR) 552 scan_chan_list[chan_idx].max_scan_time = 553 cpu_to_le16(adapter->passive_scan_time); 554 else 555 scan_chan_list[chan_idx].max_scan_time = 556 cpu_to_le16(adapter-> 557 specific_scan_time); 558 559 if (ch->flags & IEEE80211_CHAN_NO_IR) 560 scan_chan_list[chan_idx].chan_scan_mode_bitmap 561 |= MWIFIEX_PASSIVE_SCAN; 562 else 563 scan_chan_list[chan_idx].chan_scan_mode_bitmap 564 &= ~MWIFIEX_PASSIVE_SCAN; 565 566 scan_chan_list[chan_idx].chan_number = 567 (u32)ch->hw_value; 568 chan_idx++; 569 } 570 } 571 return chan_idx; 572 } 573 574 /* This function appends rate TLV to scan config command. */ 575 static int 576 mwifiex_append_rate_tlv(struct mwifiex_private *priv, 577 struct mwifiex_scan_cmd_config *scan_cfg_out, 578 u8 radio) 579 { 580 struct mwifiex_ie_types_rates_param_set *rates_tlv; 581 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos; 582 u32 rates_size; 583 584 memset(rates, 0, sizeof(rates)); 585 586 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len; 587 588 if (priv->scan_request) 589 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates, 590 radio); 591 else 592 rates_size = mwifiex_get_supported_rates(priv, rates); 593 594 mwifiex_dbg(priv->adapter, CMD, 595 "info: SCAN_CMD: Rates size = %d\n", 596 rates_size); 597 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos; 598 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); 599 rates_tlv->header.len = cpu_to_le16((u16) rates_size); 600 memcpy(rates_tlv->rates, rates, rates_size); 601 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size; 602 603 return rates_size; 604 } 605 606 /* 607 * This function constructs and sends multiple scan config commands to 608 * the firmware. 609 * 610 * Previous routines in the code flow have created a scan command configuration 611 * with any requested TLVs. This function splits the channel TLV into maximum 612 * channels supported per scan lists and sends the portion of the channel TLV, 613 * along with the other TLVs, to the firmware. 614 */ 615 static int 616 mwifiex_scan_channel_list(struct mwifiex_private *priv, 617 u32 max_chan_per_scan, u8 filtered_scan, 618 struct mwifiex_scan_cmd_config *scan_cfg_out, 619 struct mwifiex_ie_types_chan_list_param_set 620 *chan_tlv_out, 621 struct mwifiex_chan_scan_param_set *scan_chan_list) 622 { 623 struct mwifiex_adapter *adapter = priv->adapter; 624 int ret = 0; 625 struct mwifiex_chan_scan_param_set *tmp_chan_list; 626 struct mwifiex_chan_scan_param_set *start_chan; 627 u32 tlv_idx, rates_size, cmd_no; 628 u32 total_scan_time; 629 u32 done_early; 630 u8 radio_type; 631 632 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { 633 mwifiex_dbg(priv->adapter, ERROR, 634 "info: Scan: Null detect: %p, %p, %p\n", 635 scan_cfg_out, chan_tlv_out, scan_chan_list); 636 return -1; 637 } 638 639 /* Check csa channel expiry before preparing scan list */ 640 mwifiex_11h_get_csa_closed_channel(priv); 641 642 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 643 644 /* Set the temp channel struct pointer to the start of the desired 645 list */ 646 tmp_chan_list = scan_chan_list; 647 648 /* Loop through the desired channel list, sending a new firmware scan 649 commands for each max_chan_per_scan channels (or for 1,6,11 650 individually if configured accordingly) */ 651 while (tmp_chan_list->chan_number) { 652 653 tlv_idx = 0; 654 total_scan_time = 0; 655 radio_type = 0; 656 chan_tlv_out->header.len = 0; 657 start_chan = tmp_chan_list; 658 done_early = false; 659 660 /* 661 * Construct the Channel TLV for the scan command. Continue to 662 * insert channel TLVs until: 663 * - the tlv_idx hits the maximum configured per scan command 664 * - the next channel to insert is 0 (end of desired channel 665 * list) 666 * - done_early is set (controlling individual scanning of 667 * 1,6,11) 668 */ 669 while (tlv_idx < max_chan_per_scan && 670 tmp_chan_list->chan_number && !done_early) { 671 672 if (tmp_chan_list->chan_number == priv->csa_chan) { 673 tmp_chan_list++; 674 continue; 675 } 676 677 radio_type = tmp_chan_list->radio_type; 678 mwifiex_dbg(priv->adapter, INFO, 679 "info: Scan: Chan(%3d), Radio(%d),\t" 680 "Mode(%d, %d), Dur(%d)\n", 681 tmp_chan_list->chan_number, 682 tmp_chan_list->radio_type, 683 tmp_chan_list->chan_scan_mode_bitmap 684 & MWIFIEX_PASSIVE_SCAN, 685 (tmp_chan_list->chan_scan_mode_bitmap 686 & MWIFIEX_DISABLE_CHAN_FILT) >> 1, 687 le16_to_cpu(tmp_chan_list->max_scan_time)); 688 689 /* Copy the current channel TLV to the command being 690 prepared */ 691 memcpy(chan_tlv_out->chan_scan_param + tlv_idx, 692 tmp_chan_list, 693 sizeof(chan_tlv_out->chan_scan_param)); 694 695 /* Increment the TLV header length by the size 696 appended */ 697 le16_unaligned_add_cpu(&chan_tlv_out->header.len, 698 sizeof( 699 chan_tlv_out->chan_scan_param)); 700 701 /* 702 * The tlv buffer length is set to the number of bytes 703 * of the between the channel tlv pointer and the start 704 * of the tlv buffer. This compensates for any TLVs 705 * that were appended before the channel list. 706 */ 707 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - 708 scan_cfg_out->tlv_buf); 709 710 /* Add the size of the channel tlv header and the data 711 length */ 712 scan_cfg_out->tlv_buf_len += 713 (sizeof(chan_tlv_out->header) 714 + le16_to_cpu(chan_tlv_out->header.len)); 715 716 /* Increment the index to the channel tlv we are 717 constructing */ 718 tlv_idx++; 719 720 /* Count the total scan time per command */ 721 total_scan_time += 722 le16_to_cpu(tmp_chan_list->max_scan_time); 723 724 done_early = false; 725 726 /* Stop the loop if the *current* channel is in the 727 1,6,11 set and we are not filtering on a BSSID 728 or SSID. */ 729 if (!filtered_scan && 730 (tmp_chan_list->chan_number == 1 || 731 tmp_chan_list->chan_number == 6 || 732 tmp_chan_list->chan_number == 11)) 733 done_early = true; 734 735 /* Increment the tmp pointer to the next channel to 736 be scanned */ 737 tmp_chan_list++; 738 739 /* Stop the loop if the *next* channel is in the 1,6,11 740 set. This will cause it to be the only channel 741 scanned on the next interation */ 742 if (!filtered_scan && 743 (tmp_chan_list->chan_number == 1 || 744 tmp_chan_list->chan_number == 6 || 745 tmp_chan_list->chan_number == 11)) 746 done_early = true; 747 } 748 749 /* The total scan time should be less than scan command timeout 750 value */ 751 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { 752 mwifiex_dbg(priv->adapter, ERROR, 753 "total scan time %dms\t" 754 "is over limit (%dms), scan skipped\n", 755 total_scan_time, 756 MWIFIEX_MAX_TOTAL_SCAN_TIME); 757 ret = -1; 758 break; 759 } 760 761 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out, 762 radio_type); 763 764 priv->adapter->scan_channels = start_chan; 765 766 /* Send the scan command to the firmware with the specified 767 cfg */ 768 if (priv->adapter->ext_scan) 769 cmd_no = HostCmd_CMD_802_11_SCAN_EXT; 770 else 771 cmd_no = HostCmd_CMD_802_11_SCAN; 772 773 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET, 774 0, scan_cfg_out, false); 775 776 /* rate IE is updated per scan command but same starting 777 * pointer is used each time so that rate IE from earlier 778 * scan_cfg_out->buf is overwritten with new one. 779 */ 780 scan_cfg_out->tlv_buf_len -= 781 sizeof(struct mwifiex_ie_types_header) + rates_size; 782 783 if (ret) { 784 mwifiex_cancel_pending_scan_cmd(adapter); 785 break; 786 } 787 } 788 789 if (ret) 790 return -1; 791 792 return 0; 793 } 794 795 /* 796 * This function constructs a scan command configuration structure to use 797 * in scan commands. 798 * 799 * Application layer or other functions can invoke network scanning 800 * with a scan configuration supplied in a user scan configuration structure. 801 * This structure is used as the basis of one or many scan command configuration 802 * commands that are sent to the command processing module and eventually to the 803 * firmware. 804 * 805 * This function creates a scan command configuration structure based on the 806 * following user supplied parameters (if present): 807 * - SSID filter 808 * - BSSID filter 809 * - Number of Probes to be sent 810 * - Channel list 811 * 812 * If the SSID or BSSID filter is not present, the filter is disabled/cleared. 813 * If the number of probes is not set, adapter default setting is used. 814 */ 815 static void 816 mwifiex_config_scan(struct mwifiex_private *priv, 817 const struct mwifiex_user_scan_cfg *user_scan_in, 818 struct mwifiex_scan_cmd_config *scan_cfg_out, 819 struct mwifiex_ie_types_chan_list_param_set **chan_list_out, 820 struct mwifiex_chan_scan_param_set *scan_chan_list, 821 u8 *max_chan_per_scan, u8 *filtered_scan, 822 u8 *scan_current_only) 823 { 824 struct mwifiex_adapter *adapter = priv->adapter; 825 struct mwifiex_ie_types_num_probes *num_probes_tlv; 826 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv; 827 struct mwifiex_ie_types_random_mac *random_mac_tlv; 828 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 829 struct mwifiex_ie_types_bssid_list *bssid_tlv; 830 u8 *tlv_pos; 831 u32 num_probes; 832 u32 ssid_len; 833 u32 chan_idx; 834 u32 scan_type; 835 u16 scan_dur; 836 u8 channel; 837 u8 radio_type; 838 int i; 839 u8 ssid_filter; 840 struct mwifiex_ie_types_htcap *ht_cap; 841 struct mwifiex_ie_types_bss_mode *bss_mode; 842 const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0}; 843 844 /* The tlv_buf_len is calculated for each scan command. The TLVs added 845 in this routine will be preserved since the routine that sends the 846 command will append channelTLVs at *chan_list_out. The difference 847 between the *chan_list_out and the tlv_buf start will be used to 848 calculate the size of anything we add in this routine. */ 849 scan_cfg_out->tlv_buf_len = 0; 850 851 /* Running tlv pointer. Assigned to chan_list_out at end of function 852 so later routines know where channels can be added to the command 853 buf */ 854 tlv_pos = scan_cfg_out->tlv_buf; 855 856 /* Initialize the scan as un-filtered; the flag is later set to TRUE 857 below if a SSID or BSSID filter is sent in the command */ 858 *filtered_scan = false; 859 860 /* Initialize the scan as not being only on the current channel. If 861 the channel list is customized, only contains one channel, and is 862 the active channel, this is set true and data flow is not halted. */ 863 *scan_current_only = false; 864 865 if (user_scan_in) { 866 u8 tmpaddr[ETH_ALEN]; 867 868 /* Default the ssid_filter flag to TRUE, set false under 869 certain wildcard conditions and qualified by the existence 870 of an SSID list before marking the scan as filtered */ 871 ssid_filter = true; 872 873 /* Set the BSS type scan filter, use Adapter setting if 874 unset */ 875 scan_cfg_out->bss_mode = 876 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode); 877 878 /* Set the number of probes to send, use Adapter setting 879 if unset */ 880 num_probes = user_scan_in->num_probes ?: adapter->scan_probes; 881 882 /* 883 * Set the BSSID filter to the incoming configuration, 884 * if non-zero. If not set, it will remain disabled 885 * (all zeros). 886 */ 887 memcpy(scan_cfg_out->specific_bssid, 888 user_scan_in->specific_bssid, 889 sizeof(scan_cfg_out->specific_bssid)); 890 891 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 892 893 if (adapter->ext_scan && 894 !is_zero_ether_addr(tmpaddr)) { 895 bssid_tlv = 896 (struct mwifiex_ie_types_bssid_list *)tlv_pos; 897 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID); 898 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN); 899 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid, 900 ETH_ALEN); 901 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list); 902 } 903 904 for (i = 0; i < user_scan_in->num_ssids; i++) { 905 ssid_len = user_scan_in->ssid_list[i].ssid_len; 906 907 wildcard_ssid_tlv = 908 (struct mwifiex_ie_types_wildcard_ssid_params *) 909 tlv_pos; 910 wildcard_ssid_tlv->header.type = 911 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 912 wildcard_ssid_tlv->header.len = cpu_to_le16( 913 (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> 914 max_ssid_length))); 915 916 /* 917 * max_ssid_length = 0 tells firmware to perform 918 * specific scan for the SSID filled, whereas 919 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 920 * wildcard scan. 921 */ 922 if (ssid_len) 923 wildcard_ssid_tlv->max_ssid_length = 0; 924 else 925 wildcard_ssid_tlv->max_ssid_length = 926 IEEE80211_MAX_SSID_LEN; 927 928 if (!memcmp(user_scan_in->ssid_list[i].ssid, 929 "DIRECT-", 7)) 930 wildcard_ssid_tlv->max_ssid_length = 0xfe; 931 932 memcpy(wildcard_ssid_tlv->ssid, 933 user_scan_in->ssid_list[i].ssid, ssid_len); 934 935 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 936 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 937 938 mwifiex_dbg(adapter, INFO, 939 "info: scan: ssid[%d]: %s, %d\n", 940 i, wildcard_ssid_tlv->ssid, 941 wildcard_ssid_tlv->max_ssid_length); 942 943 /* Empty wildcard ssid with a maxlen will match many or 944 potentially all SSIDs (maxlen == 32), therefore do 945 not treat the scan as 946 filtered. */ 947 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) 948 ssid_filter = false; 949 } 950 951 /* 952 * The default number of channels sent in the command is low to 953 * ensure the response buffer from the firmware does not 954 * truncate scan results. That is not an issue with an SSID 955 * or BSSID filter applied to the scan results in the firmware. 956 */ 957 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 958 if ((i && ssid_filter) || 959 !is_zero_ether_addr(tmpaddr)) 960 *filtered_scan = true; 961 962 if (user_scan_in->scan_chan_gap) { 963 mwifiex_dbg(adapter, INFO, 964 "info: scan: channel gap = %d\n", 965 user_scan_in->scan_chan_gap); 966 *max_chan_per_scan = 967 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 968 969 chan_gap_tlv = (void *)tlv_pos; 970 chan_gap_tlv->header.type = 971 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP); 972 chan_gap_tlv->header.len = 973 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap)); 974 chan_gap_tlv->chan_gap = 975 cpu_to_le16((user_scan_in->scan_chan_gap)); 976 tlv_pos += 977 sizeof(struct mwifiex_ie_types_scan_chan_gap); 978 } 979 980 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) { 981 random_mac_tlv = (void *)tlv_pos; 982 random_mac_tlv->header.type = 983 cpu_to_le16(TLV_TYPE_RANDOM_MAC); 984 random_mac_tlv->header.len = 985 cpu_to_le16(sizeof(random_mac_tlv->mac)); 986 ether_addr_copy(random_mac_tlv->mac, 987 user_scan_in->random_mac); 988 tlv_pos += 989 sizeof(struct mwifiex_ie_types_random_mac); 990 } 991 } else { 992 scan_cfg_out->bss_mode = (u8) adapter->scan_mode; 993 num_probes = adapter->scan_probes; 994 } 995 996 /* 997 * If a specific BSSID or SSID is used, the number of channels in the 998 * scan command will be increased to the absolute maximum. 999 */ 1000 if (*filtered_scan) { 1001 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 1002 } else { 1003 if (!priv->media_connected) 1004 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD; 1005 else 1006 *max_chan_per_scan = 1007 MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD / 2; 1008 } 1009 1010 if (adapter->ext_scan) { 1011 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos; 1012 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE); 1013 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode)); 1014 bss_mode->bss_mode = scan_cfg_out->bss_mode; 1015 tlv_pos += sizeof(bss_mode->header) + 1016 le16_to_cpu(bss_mode->header.len); 1017 } 1018 1019 /* If the input config or adapter has the number of Probes set, 1020 add tlv */ 1021 if (num_probes) { 1022 1023 mwifiex_dbg(adapter, INFO, 1024 "info: scan: num_probes = %d\n", 1025 num_probes); 1026 1027 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; 1028 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 1029 num_probes_tlv->header.len = 1030 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 1031 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); 1032 1033 tlv_pos += sizeof(num_probes_tlv->header) + 1034 le16_to_cpu(num_probes_tlv->header.len); 1035 1036 } 1037 1038 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) && 1039 (priv->adapter->config_bands & BAND_GN || 1040 priv->adapter->config_bands & BAND_AN)) { 1041 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; 1042 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); 1043 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); 1044 ht_cap->header.len = 1045 cpu_to_le16(sizeof(struct ieee80211_ht_cap)); 1046 radio_type = 1047 mwifiex_band_to_radio_type(priv->adapter->config_bands); 1048 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap); 1049 tlv_pos += sizeof(struct mwifiex_ie_types_htcap); 1050 } 1051 1052 /* Append vendor specific IE TLV */ 1053 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); 1054 1055 /* 1056 * Set the output for the channel TLV to the address in the tlv buffer 1057 * past any TLVs that were added in this function (SSID, num_probes). 1058 * Channel TLVs will be added past this for each scan command, 1059 * preserving the TLVs that were previously added. 1060 */ 1061 *chan_list_out = 1062 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; 1063 1064 if (user_scan_in && user_scan_in->chan_list[0].chan_number) { 1065 1066 mwifiex_dbg(adapter, INFO, 1067 "info: Scan: Using supplied channel list\n"); 1068 1069 for (chan_idx = 0; 1070 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX && 1071 user_scan_in->chan_list[chan_idx].chan_number; 1072 chan_idx++) { 1073 1074 channel = user_scan_in->chan_list[chan_idx].chan_number; 1075 scan_chan_list[chan_idx].chan_number = channel; 1076 1077 radio_type = 1078 user_scan_in->chan_list[chan_idx].radio_type; 1079 scan_chan_list[chan_idx].radio_type = radio_type; 1080 1081 scan_type = user_scan_in->chan_list[chan_idx].scan_type; 1082 1083 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1084 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1085 |= (MWIFIEX_PASSIVE_SCAN | 1086 MWIFIEX_HIDDEN_SSID_REPORT); 1087 else 1088 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1089 &= ~MWIFIEX_PASSIVE_SCAN; 1090 1091 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1092 |= MWIFIEX_DISABLE_CHAN_FILT; 1093 1094 if (user_scan_in->chan_list[chan_idx].scan_time) { 1095 scan_dur = (u16) user_scan_in-> 1096 chan_list[chan_idx].scan_time; 1097 } else { 1098 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1099 scan_dur = adapter->passive_scan_time; 1100 else if (*filtered_scan) 1101 scan_dur = adapter->specific_scan_time; 1102 else 1103 scan_dur = adapter->active_scan_time; 1104 } 1105 1106 scan_chan_list[chan_idx].min_scan_time = 1107 cpu_to_le16(scan_dur); 1108 scan_chan_list[chan_idx].max_scan_time = 1109 cpu_to_le16(scan_dur); 1110 } 1111 1112 /* Check if we are only scanning the current channel */ 1113 if ((chan_idx == 1) && 1114 (user_scan_in->chan_list[0].chan_number == 1115 priv->curr_bss_params.bss_descriptor.channel)) { 1116 *scan_current_only = true; 1117 mwifiex_dbg(adapter, INFO, 1118 "info: Scan: Scanning current channel only\n"); 1119 } 1120 } else { 1121 mwifiex_dbg(adapter, INFO, 1122 "info: Scan: Creating full region channel list\n"); 1123 mwifiex_scan_create_channel_list(priv, user_scan_in, 1124 scan_chan_list, 1125 *filtered_scan); 1126 } 1127 1128 } 1129 1130 /* 1131 * This function inspects the scan response buffer for pointers to 1132 * expected TLVs. 1133 * 1134 * TLVs can be included at the end of the scan response BSS information. 1135 * 1136 * Data in the buffer is parsed pointers to TLVs that can potentially 1137 * be passed back in the response. 1138 */ 1139 static void 1140 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, 1141 struct mwifiex_ie_types_data *tlv, 1142 u32 tlv_buf_size, u32 req_tlv_type, 1143 struct mwifiex_ie_types_data **tlv_data) 1144 { 1145 struct mwifiex_ie_types_data *current_tlv; 1146 u32 tlv_buf_left; 1147 u32 tlv_type; 1148 u32 tlv_len; 1149 1150 current_tlv = tlv; 1151 tlv_buf_left = tlv_buf_size; 1152 *tlv_data = NULL; 1153 1154 mwifiex_dbg(adapter, INFO, 1155 "info: SCAN_RESP: tlv_buf_size = %d\n", 1156 tlv_buf_size); 1157 1158 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { 1159 1160 tlv_type = le16_to_cpu(current_tlv->header.type); 1161 tlv_len = le16_to_cpu(current_tlv->header.len); 1162 1163 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { 1164 mwifiex_dbg(adapter, ERROR, 1165 "SCAN_RESP: TLV buffer corrupt\n"); 1166 break; 1167 } 1168 1169 if (req_tlv_type == tlv_type) { 1170 switch (tlv_type) { 1171 case TLV_TYPE_TSFTIMESTAMP: 1172 mwifiex_dbg(adapter, INFO, 1173 "info: SCAN_RESP: TSF\t" 1174 "timestamp TLV, len = %d\n", 1175 tlv_len); 1176 *tlv_data = current_tlv; 1177 break; 1178 case TLV_TYPE_CHANNELBANDLIST: 1179 mwifiex_dbg(adapter, INFO, 1180 "info: SCAN_RESP: channel\t" 1181 "band list TLV, len = %d\n", 1182 tlv_len); 1183 *tlv_data = current_tlv; 1184 break; 1185 default: 1186 mwifiex_dbg(adapter, ERROR, 1187 "SCAN_RESP: unhandled TLV = %d\n", 1188 tlv_type); 1189 /* Give up, this seems corrupted */ 1190 return; 1191 } 1192 } 1193 1194 if (*tlv_data) 1195 break; 1196 1197 1198 tlv_buf_left -= (sizeof(tlv->header) + tlv_len); 1199 current_tlv = 1200 (struct mwifiex_ie_types_data *) (current_tlv->data + 1201 tlv_len); 1202 1203 } /* while */ 1204 } 1205 1206 /* 1207 * This function parses provided beacon buffer and updates 1208 * respective fields in bss descriptor structure. 1209 */ 1210 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1211 struct mwifiex_bssdescriptor *bss_entry) 1212 { 1213 int ret = 0; 1214 u8 element_id; 1215 struct ieee_types_fh_param_set *fh_param_set; 1216 struct ieee_types_ds_param_set *ds_param_set; 1217 struct ieee_types_cf_param_set *cf_param_set; 1218 struct ieee_types_ibss_param_set *ibss_param_set; 1219 u8 *current_ptr; 1220 u8 *rate; 1221 u8 element_len; 1222 u16 total_ie_len; 1223 u8 bytes_to_copy; 1224 u8 rate_size; 1225 u8 found_data_rate_ie; 1226 u32 bytes_left; 1227 struct ieee_types_vendor_specific *vendor_ie; 1228 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1229 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1230 1231 found_data_rate_ie = false; 1232 rate_size = 0; 1233 current_ptr = bss_entry->beacon_buf; 1234 bytes_left = bss_entry->beacon_buf_size; 1235 1236 /* Process variable IE */ 1237 while (bytes_left >= 2) { 1238 element_id = *current_ptr; 1239 element_len = *(current_ptr + 1); 1240 total_ie_len = element_len + sizeof(struct ieee_types_header); 1241 1242 if (bytes_left < total_ie_len) { 1243 mwifiex_dbg(adapter, ERROR, 1244 "err: InterpretIE: in processing\t" 1245 "IE, bytes left < IE length\n"); 1246 return -1; 1247 } 1248 switch (element_id) { 1249 case WLAN_EID_SSID: 1250 if (element_len > IEEE80211_MAX_SSID_LEN) 1251 return -EINVAL; 1252 bss_entry->ssid.ssid_len = element_len; 1253 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1254 element_len); 1255 mwifiex_dbg(adapter, INFO, 1256 "info: InterpretIE: ssid: %-32s\n", 1257 bss_entry->ssid.ssid); 1258 break; 1259 1260 case WLAN_EID_SUPP_RATES: 1261 if (element_len > MWIFIEX_SUPPORTED_RATES) 1262 return -EINVAL; 1263 memcpy(bss_entry->data_rates, current_ptr + 2, 1264 element_len); 1265 memcpy(bss_entry->supported_rates, current_ptr + 2, 1266 element_len); 1267 rate_size = element_len; 1268 found_data_rate_ie = true; 1269 break; 1270 1271 case WLAN_EID_FH_PARAMS: 1272 if (element_len + 2 < sizeof(*fh_param_set)) 1273 return -EINVAL; 1274 fh_param_set = 1275 (struct ieee_types_fh_param_set *) current_ptr; 1276 memcpy(&bss_entry->phy_param_set.fh_param_set, 1277 fh_param_set, 1278 sizeof(struct ieee_types_fh_param_set)); 1279 break; 1280 1281 case WLAN_EID_DS_PARAMS: 1282 if (element_len + 2 < sizeof(*ds_param_set)) 1283 return -EINVAL; 1284 ds_param_set = 1285 (struct ieee_types_ds_param_set *) current_ptr; 1286 1287 bss_entry->channel = ds_param_set->current_chan; 1288 1289 memcpy(&bss_entry->phy_param_set.ds_param_set, 1290 ds_param_set, 1291 sizeof(struct ieee_types_ds_param_set)); 1292 break; 1293 1294 case WLAN_EID_CF_PARAMS: 1295 if (element_len + 2 < sizeof(*cf_param_set)) 1296 return -EINVAL; 1297 cf_param_set = 1298 (struct ieee_types_cf_param_set *) current_ptr; 1299 memcpy(&bss_entry->ss_param_set.cf_param_set, 1300 cf_param_set, 1301 sizeof(struct ieee_types_cf_param_set)); 1302 break; 1303 1304 case WLAN_EID_IBSS_PARAMS: 1305 if (element_len + 2 < sizeof(*ibss_param_set)) 1306 return -EINVAL; 1307 ibss_param_set = 1308 (struct ieee_types_ibss_param_set *) 1309 current_ptr; 1310 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1311 ibss_param_set, 1312 sizeof(struct ieee_types_ibss_param_set)); 1313 break; 1314 1315 case WLAN_EID_ERP_INFO: 1316 if (!element_len) 1317 return -EINVAL; 1318 bss_entry->erp_flags = *(current_ptr + 2); 1319 break; 1320 1321 case WLAN_EID_PWR_CONSTRAINT: 1322 if (!element_len) 1323 return -EINVAL; 1324 bss_entry->local_constraint = *(current_ptr + 2); 1325 bss_entry->sensed_11h = true; 1326 break; 1327 1328 case WLAN_EID_CHANNEL_SWITCH: 1329 bss_entry->chan_sw_ie_present = true; 1330 /* fall through */ 1331 case WLAN_EID_PWR_CAPABILITY: 1332 case WLAN_EID_TPC_REPORT: 1333 case WLAN_EID_QUIET: 1334 bss_entry->sensed_11h = true; 1335 break; 1336 1337 case WLAN_EID_EXT_SUPP_RATES: 1338 /* 1339 * Only process extended supported rate 1340 * if data rate is already found. 1341 * Data rate IE should come before 1342 * extended supported rate IE 1343 */ 1344 if (found_data_rate_ie) { 1345 if ((element_len + rate_size) > 1346 MWIFIEX_SUPPORTED_RATES) 1347 bytes_to_copy = 1348 (MWIFIEX_SUPPORTED_RATES - 1349 rate_size); 1350 else 1351 bytes_to_copy = element_len; 1352 1353 rate = (u8 *) bss_entry->data_rates; 1354 rate += rate_size; 1355 memcpy(rate, current_ptr + 2, bytes_to_copy); 1356 1357 rate = (u8 *) bss_entry->supported_rates; 1358 rate += rate_size; 1359 memcpy(rate, current_ptr + 2, bytes_to_copy); 1360 } 1361 break; 1362 1363 case WLAN_EID_VENDOR_SPECIFIC: 1364 if (element_len + 2 < sizeof(vendor_ie->vend_hdr)) 1365 return -EINVAL; 1366 1367 vendor_ie = (struct ieee_types_vendor_specific *) 1368 current_ptr; 1369 1370 if (!memcmp 1371 (vendor_ie->vend_hdr.oui, wpa_oui, 1372 sizeof(wpa_oui))) { 1373 bss_entry->bcn_wpa_ie = 1374 (struct ieee_types_vendor_specific *) 1375 current_ptr; 1376 bss_entry->wpa_offset = (u16) 1377 (current_ptr - bss_entry->beacon_buf); 1378 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui, 1379 sizeof(wmm_oui))) { 1380 if (total_ie_len == 1381 sizeof(struct ieee_types_wmm_parameter) || 1382 total_ie_len == 1383 sizeof(struct ieee_types_wmm_info)) 1384 /* 1385 * Only accept and copy the WMM IE if 1386 * it matches the size expected for the 1387 * WMM Info IE or the WMM Parameter IE. 1388 */ 1389 memcpy((u8 *) &bss_entry->wmm_ie, 1390 current_ptr, total_ie_len); 1391 } 1392 break; 1393 case WLAN_EID_RSN: 1394 bss_entry->bcn_rsn_ie = 1395 (struct ieee_types_generic *) current_ptr; 1396 bss_entry->rsn_offset = (u16) (current_ptr - 1397 bss_entry->beacon_buf); 1398 break; 1399 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1400 bss_entry->bcn_wapi_ie = 1401 (struct ieee_types_generic *) current_ptr; 1402 bss_entry->wapi_offset = (u16) (current_ptr - 1403 bss_entry->beacon_buf); 1404 break; 1405 case WLAN_EID_HT_CAPABILITY: 1406 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1407 (current_ptr + 1408 sizeof(struct ieee_types_header)); 1409 bss_entry->ht_cap_offset = (u16) (current_ptr + 1410 sizeof(struct ieee_types_header) - 1411 bss_entry->beacon_buf); 1412 break; 1413 case WLAN_EID_HT_OPERATION: 1414 bss_entry->bcn_ht_oper = 1415 (struct ieee80211_ht_operation *)(current_ptr + 1416 sizeof(struct ieee_types_header)); 1417 bss_entry->ht_info_offset = (u16) (current_ptr + 1418 sizeof(struct ieee_types_header) - 1419 bss_entry->beacon_buf); 1420 break; 1421 case WLAN_EID_VHT_CAPABILITY: 1422 bss_entry->disable_11ac = false; 1423 bss_entry->bcn_vht_cap = 1424 (void *)(current_ptr + 1425 sizeof(struct ieee_types_header)); 1426 bss_entry->vht_cap_offset = 1427 (u16)((u8 *)bss_entry->bcn_vht_cap - 1428 bss_entry->beacon_buf); 1429 break; 1430 case WLAN_EID_VHT_OPERATION: 1431 bss_entry->bcn_vht_oper = 1432 (void *)(current_ptr + 1433 sizeof(struct ieee_types_header)); 1434 bss_entry->vht_info_offset = 1435 (u16)((u8 *)bss_entry->bcn_vht_oper - 1436 bss_entry->beacon_buf); 1437 break; 1438 case WLAN_EID_BSS_COEX_2040: 1439 bss_entry->bcn_bss_co_2040 = current_ptr; 1440 bss_entry->bss_co_2040_offset = 1441 (u16) (current_ptr - bss_entry->beacon_buf); 1442 break; 1443 case WLAN_EID_EXT_CAPABILITY: 1444 bss_entry->bcn_ext_cap = current_ptr; 1445 bss_entry->ext_cap_offset = 1446 (u16) (current_ptr - bss_entry->beacon_buf); 1447 break; 1448 case WLAN_EID_OPMODE_NOTIF: 1449 bss_entry->oper_mode = (void *)current_ptr; 1450 bss_entry->oper_mode_offset = 1451 (u16)((u8 *)bss_entry->oper_mode - 1452 bss_entry->beacon_buf); 1453 break; 1454 default: 1455 break; 1456 } 1457 1458 current_ptr += element_len + 2; 1459 1460 /* Need to account for IE ID and IE Len */ 1461 bytes_left -= (element_len + 2); 1462 1463 } /* while (bytes_left > 2) */ 1464 return ret; 1465 } 1466 1467 /* 1468 * This function converts radio type scan parameter to a band configuration 1469 * to be used in join command. 1470 */ 1471 static u8 1472 mwifiex_radio_type_to_band(u8 radio_type) 1473 { 1474 switch (radio_type) { 1475 case HostCmd_SCAN_RADIO_TYPE_A: 1476 return BAND_A; 1477 case HostCmd_SCAN_RADIO_TYPE_BG: 1478 default: 1479 return BAND_G; 1480 } 1481 } 1482 1483 /* 1484 * This is an internal function used to start a scan based on an input 1485 * configuration. 1486 * 1487 * This uses the input user scan configuration information when provided in 1488 * order to send the appropriate scan commands to firmware to populate or 1489 * update the internal driver scan table. 1490 */ 1491 int mwifiex_scan_networks(struct mwifiex_private *priv, 1492 const struct mwifiex_user_scan_cfg *user_scan_in) 1493 { 1494 int ret; 1495 struct mwifiex_adapter *adapter = priv->adapter; 1496 struct cmd_ctrl_node *cmd_node; 1497 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1498 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1499 struct mwifiex_chan_scan_param_set *scan_chan_list; 1500 u8 filtered_scan; 1501 u8 scan_current_chan_only; 1502 u8 max_chan_per_scan; 1503 unsigned long flags; 1504 1505 if (adapter->scan_processing) { 1506 mwifiex_dbg(adapter, WARN, 1507 "cmd: Scan already in process...\n"); 1508 return -EBUSY; 1509 } 1510 1511 if (priv->scan_block) { 1512 mwifiex_dbg(adapter, WARN, 1513 "cmd: Scan is blocked during association...\n"); 1514 return -EBUSY; 1515 } 1516 1517 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags) || 1518 test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags)) { 1519 mwifiex_dbg(adapter, ERROR, 1520 "Ignore scan. Card removed or firmware in bad state\n"); 1521 return -EFAULT; 1522 } 1523 1524 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1525 adapter->scan_processing = true; 1526 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1527 1528 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1529 GFP_KERNEL); 1530 if (!scan_cfg_out) { 1531 ret = -ENOMEM; 1532 goto done; 1533 } 1534 1535 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX, 1536 sizeof(struct mwifiex_chan_scan_param_set), 1537 GFP_KERNEL); 1538 if (!scan_chan_list) { 1539 kfree(scan_cfg_out); 1540 ret = -ENOMEM; 1541 goto done; 1542 } 1543 1544 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1545 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1546 &filtered_scan, &scan_current_chan_only); 1547 1548 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1549 &scan_cfg_out->config, chan_list_out, 1550 scan_chan_list); 1551 1552 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1553 if (!ret) { 1554 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1555 if (!list_empty(&adapter->scan_pending_q)) { 1556 cmd_node = list_first_entry(&adapter->scan_pending_q, 1557 struct cmd_ctrl_node, list); 1558 list_del(&cmd_node->list); 1559 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1560 flags); 1561 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 1562 queue_work(adapter->workqueue, &adapter->main_work); 1563 1564 /* Perform internal scan synchronously */ 1565 if (!priv->scan_request) { 1566 mwifiex_dbg(adapter, INFO, 1567 "wait internal scan\n"); 1568 mwifiex_wait_queue_complete(adapter, cmd_node); 1569 } 1570 } else { 1571 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1572 flags); 1573 } 1574 } 1575 1576 kfree(scan_cfg_out); 1577 kfree(scan_chan_list); 1578 done: 1579 if (ret) { 1580 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1581 adapter->scan_processing = false; 1582 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1583 } 1584 return ret; 1585 } 1586 1587 /* 1588 * This function prepares a scan command to be sent to the firmware. 1589 * 1590 * This uses the scan command configuration sent to the command processing 1591 * module in command preparation stage to configure a scan command structure 1592 * to send to firmware. 1593 * 1594 * The fixed fields specifying the BSS type and BSSID filters as well as a 1595 * variable number/length of TLVs are sent in the command to firmware. 1596 * 1597 * Preparation also includes - 1598 * - Setting command ID, and proper size 1599 * - Ensuring correct endian-ness 1600 */ 1601 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1602 struct mwifiex_scan_cmd_config *scan_cfg) 1603 { 1604 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1605 1606 /* Set fixed field variables in scan command */ 1607 scan_cmd->bss_mode = scan_cfg->bss_mode; 1608 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1609 sizeof(scan_cmd->bssid)); 1610 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1611 1612 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1613 1614 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1615 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1616 + sizeof(scan_cmd->bssid) 1617 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1618 1619 return 0; 1620 } 1621 1622 /* 1623 * This function checks compatibility of requested network with current 1624 * driver settings. 1625 */ 1626 int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1627 struct mwifiex_bssdescriptor *bss_desc) 1628 { 1629 int ret = -1; 1630 1631 if (!bss_desc) 1632 return -1; 1633 1634 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1635 (u16) bss_desc->channel, 0))) { 1636 switch (priv->bss_mode) { 1637 case NL80211_IFTYPE_STATION: 1638 case NL80211_IFTYPE_ADHOC: 1639 ret = mwifiex_is_network_compatible(priv, bss_desc, 1640 priv->bss_mode); 1641 if (ret) 1642 mwifiex_dbg(priv->adapter, ERROR, 1643 "Incompatible network settings\n"); 1644 break; 1645 default: 1646 ret = 0; 1647 } 1648 } 1649 1650 return ret; 1651 } 1652 1653 /* This function checks if SSID string contains all zeroes or length is zero */ 1654 static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) 1655 { 1656 int idx; 1657 1658 for (idx = 0; idx < ssid->ssid_len; idx++) { 1659 if (ssid->ssid[idx]) 1660 return false; 1661 } 1662 1663 return true; 1664 } 1665 1666 /* This function checks if any hidden SSID found in passive scan channels 1667 * and save those channels for specific SSID active scan 1668 */ 1669 static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, 1670 struct cfg80211_bss *bss) 1671 { 1672 struct mwifiex_bssdescriptor *bss_desc; 1673 int ret; 1674 int chid; 1675 1676 /* Allocate and fill new bss descriptor */ 1677 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); 1678 if (!bss_desc) 1679 return -ENOMEM; 1680 1681 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1682 if (ret) 1683 goto done; 1684 1685 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { 1686 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); 1687 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { 1688 if (priv->hidden_chan[chid].chan_number == 1689 bss->channel->hw_value) 1690 break; 1691 1692 if (!priv->hidden_chan[chid].chan_number) { 1693 priv->hidden_chan[chid].chan_number = 1694 bss->channel->hw_value; 1695 priv->hidden_chan[chid].radio_type = 1696 bss->channel->band; 1697 priv->hidden_chan[chid].scan_type = 1698 MWIFIEX_SCAN_TYPE_ACTIVE; 1699 break; 1700 } 1701 } 1702 } 1703 1704 done: 1705 /* beacon_ie buffer was allocated in function 1706 * mwifiex_fill_new_bss_desc(). Free it now. 1707 */ 1708 kfree(bss_desc->beacon_buf); 1709 kfree(bss_desc); 1710 return 0; 1711 } 1712 1713 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, 1714 struct cfg80211_bss *bss) 1715 { 1716 struct mwifiex_bssdescriptor *bss_desc; 1717 int ret; 1718 unsigned long flags; 1719 1720 /* Allocate and fill new bss descriptor */ 1721 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL); 1722 if (!bss_desc) 1723 return -ENOMEM; 1724 1725 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1726 if (ret) 1727 goto done; 1728 1729 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1730 if (ret) 1731 goto done; 1732 1733 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); 1734 /* Make a copy of current BSSID descriptor */ 1735 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1736 sizeof(priv->curr_bss_params.bss_descriptor)); 1737 1738 /* The contents of beacon_ie will be copied to its own buffer 1739 * in mwifiex_save_curr_bcn() 1740 */ 1741 mwifiex_save_curr_bcn(priv); 1742 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); 1743 1744 done: 1745 /* beacon_ie buffer was allocated in function 1746 * mwifiex_fill_new_bss_desc(). Free it now. 1747 */ 1748 kfree(bss_desc->beacon_buf); 1749 kfree(bss_desc); 1750 return 0; 1751 } 1752 1753 static int 1754 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, 1755 u32 *bytes_left, u64 fw_tsf, u8 *radio_type, 1756 bool ext_scan, s32 rssi_val) 1757 { 1758 struct mwifiex_adapter *adapter = priv->adapter; 1759 struct mwifiex_chan_freq_power *cfp; 1760 struct cfg80211_bss *bss; 1761 u8 bssid[ETH_ALEN]; 1762 s32 rssi; 1763 const u8 *ie_buf; 1764 size_t ie_len; 1765 u16 channel = 0; 1766 u16 beacon_size = 0; 1767 u32 curr_bcn_bytes; 1768 u32 freq; 1769 u16 beacon_period; 1770 u16 cap_info_bitmap; 1771 u8 *current_ptr; 1772 u64 timestamp; 1773 struct mwifiex_fixed_bcn_param *bcn_param; 1774 struct mwifiex_bss_priv *bss_priv; 1775 1776 if (*bytes_left >= sizeof(beacon_size)) { 1777 /* Extract & convert beacon size from command buffer */ 1778 beacon_size = get_unaligned_le16((*bss_info)); 1779 *bytes_left -= sizeof(beacon_size); 1780 *bss_info += sizeof(beacon_size); 1781 } 1782 1783 if (!beacon_size || beacon_size > *bytes_left) { 1784 *bss_info += *bytes_left; 1785 *bytes_left = 0; 1786 return -EFAULT; 1787 } 1788 1789 /* Initialize the current working beacon pointer for this BSS 1790 * iteration 1791 */ 1792 current_ptr = *bss_info; 1793 1794 /* Advance the return beacon pointer past the current beacon */ 1795 *bss_info += beacon_size; 1796 *bytes_left -= beacon_size; 1797 1798 curr_bcn_bytes = beacon_size; 1799 1800 /* First 5 fields are bssid, RSSI(for legacy scan only), 1801 * time stamp, beacon interval, and capability information 1802 */ 1803 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) + 1804 sizeof(struct mwifiex_fixed_bcn_param)) { 1805 mwifiex_dbg(adapter, ERROR, 1806 "InterpretIE: not enough bytes left\n"); 1807 return -EFAULT; 1808 } 1809 1810 memcpy(bssid, current_ptr, ETH_ALEN); 1811 current_ptr += ETH_ALEN; 1812 curr_bcn_bytes -= ETH_ALEN; 1813 1814 if (!ext_scan) { 1815 rssi = (s32) *current_ptr; 1816 rssi = (-rssi) * 100; /* Convert dBm to mBm */ 1817 current_ptr += sizeof(u8); 1818 curr_bcn_bytes -= sizeof(u8); 1819 mwifiex_dbg(adapter, INFO, 1820 "info: InterpretIE: RSSI=%d\n", rssi); 1821 } else { 1822 rssi = rssi_val; 1823 } 1824 1825 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr; 1826 current_ptr += sizeof(*bcn_param); 1827 curr_bcn_bytes -= sizeof(*bcn_param); 1828 1829 timestamp = le64_to_cpu(bcn_param->timestamp); 1830 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1831 1832 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1833 mwifiex_dbg(adapter, INFO, 1834 "info: InterpretIE: capabilities=0x%X\n", 1835 cap_info_bitmap); 1836 1837 /* Rest of the current buffer are IE's */ 1838 ie_buf = current_ptr; 1839 ie_len = curr_bcn_bytes; 1840 mwifiex_dbg(adapter, INFO, 1841 "info: InterpretIE: IELength for this AP = %d\n", 1842 curr_bcn_bytes); 1843 1844 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1845 u8 element_id, element_len; 1846 1847 element_id = *current_ptr; 1848 element_len = *(current_ptr + 1); 1849 if (curr_bcn_bytes < element_len + 1850 sizeof(struct ieee_types_header)) { 1851 mwifiex_dbg(adapter, ERROR, 1852 "%s: bytes left < IE length\n", __func__); 1853 return -EFAULT; 1854 } 1855 if (element_id == WLAN_EID_DS_PARAMS) { 1856 channel = *(current_ptr + 1857 sizeof(struct ieee_types_header)); 1858 break; 1859 } 1860 1861 current_ptr += element_len + sizeof(struct ieee_types_header); 1862 curr_bcn_bytes -= element_len + 1863 sizeof(struct ieee_types_header); 1864 } 1865 1866 if (channel) { 1867 struct ieee80211_channel *chan; 1868 u8 band; 1869 1870 /* Skip entry if on csa closed channel */ 1871 if (channel == priv->csa_chan) { 1872 mwifiex_dbg(adapter, WARN, 1873 "Dropping entry on csa closed channel\n"); 1874 return 0; 1875 } 1876 1877 band = BAND_G; 1878 if (radio_type) 1879 band = mwifiex_radio_type_to_band(*radio_type & 1880 (BIT(0) | BIT(1))); 1881 1882 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1883 1884 freq = cfp ? cfp->freq : 0; 1885 1886 chan = ieee80211_get_channel(priv->wdev.wiphy, freq); 1887 1888 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1889 bss = cfg80211_inform_bss(priv->wdev.wiphy, 1890 chan, CFG80211_BSS_FTYPE_UNKNOWN, 1891 bssid, timestamp, 1892 cap_info_bitmap, beacon_period, 1893 ie_buf, ie_len, rssi, GFP_KERNEL); 1894 if (bss) { 1895 bss_priv = (struct mwifiex_bss_priv *)bss->priv; 1896 bss_priv->band = band; 1897 bss_priv->fw_tsf = fw_tsf; 1898 if (priv->media_connected && 1899 !memcmp(bssid, priv->curr_bss_params. 1900 bss_descriptor.mac_address, 1901 ETH_ALEN)) 1902 mwifiex_update_curr_bss_params(priv, 1903 bss); 1904 1905 if ((chan->flags & IEEE80211_CHAN_RADAR) || 1906 (chan->flags & IEEE80211_CHAN_NO_IR)) { 1907 mwifiex_dbg(adapter, INFO, 1908 "radar or passive channel %d\n", 1909 channel); 1910 mwifiex_save_hidden_ssid_channels(priv, 1911 bss); 1912 } 1913 1914 cfg80211_put_bss(priv->wdev.wiphy, bss); 1915 } 1916 } 1917 } else { 1918 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); 1919 } 1920 1921 return 0; 1922 } 1923 1924 static void mwifiex_complete_scan(struct mwifiex_private *priv) 1925 { 1926 struct mwifiex_adapter *adapter = priv->adapter; 1927 1928 adapter->survey_idx = 0; 1929 if (adapter->curr_cmd->wait_q_enabled) { 1930 adapter->cmd_wait_q.status = 0; 1931 if (!priv->scan_request) { 1932 mwifiex_dbg(adapter, INFO, 1933 "complete internal scan\n"); 1934 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1935 } 1936 } 1937 } 1938 1939 /* This function checks if any hidden SSID found in passive scan channels 1940 * and do specific SSID active scan for those channels 1941 */ 1942 static int 1943 mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) 1944 { 1945 int ret; 1946 struct mwifiex_adapter *adapter = priv->adapter; 1947 u8 id = 0; 1948 struct mwifiex_user_scan_cfg *user_scan_cfg; 1949 1950 if (adapter->active_scan_triggered || !priv->scan_request || 1951 priv->scan_aborting) { 1952 adapter->active_scan_triggered = false; 1953 return 0; 1954 } 1955 1956 if (!priv->hidden_chan[0].chan_number) { 1957 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); 1958 return 0; 1959 } 1960 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); 1961 1962 if (!user_scan_cfg) 1963 return -ENOMEM; 1964 1965 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { 1966 if (!priv->hidden_chan[id].chan_number) 1967 break; 1968 memcpy(&user_scan_cfg->chan_list[id], 1969 &priv->hidden_chan[id], 1970 sizeof(struct mwifiex_user_scan_chan)); 1971 } 1972 1973 adapter->active_scan_triggered = true; 1974 if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) 1975 ether_addr_copy(user_scan_cfg->random_mac, 1976 priv->scan_request->mac_addr); 1977 user_scan_cfg->num_ssids = priv->scan_request->n_ssids; 1978 user_scan_cfg->ssid_list = priv->scan_request->ssids; 1979 1980 ret = mwifiex_scan_networks(priv, user_scan_cfg); 1981 kfree(user_scan_cfg); 1982 1983 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); 1984 1985 if (ret) { 1986 dev_err(priv->adapter->dev, "scan failed: %d\n", ret); 1987 return ret; 1988 } 1989 1990 return 0; 1991 } 1992 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) 1993 { 1994 struct mwifiex_adapter *adapter = priv->adapter; 1995 struct cmd_ctrl_node *cmd_node; 1996 unsigned long flags; 1997 1998 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1999 if (list_empty(&adapter->scan_pending_q)) { 2000 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2001 2002 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 2003 adapter->scan_processing = false; 2004 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 2005 2006 mwifiex_active_scan_req_for_passive_chan(priv); 2007 2008 if (!adapter->ext_scan) 2009 mwifiex_complete_scan(priv); 2010 2011 if (priv->scan_request) { 2012 struct cfg80211_scan_info info = { 2013 .aborted = false, 2014 }; 2015 2016 mwifiex_dbg(adapter, INFO, 2017 "info: notifying scan done\n"); 2018 cfg80211_scan_done(priv->scan_request, &info); 2019 priv->scan_request = NULL; 2020 priv->scan_aborting = false; 2021 } else { 2022 priv->scan_aborting = false; 2023 mwifiex_dbg(adapter, INFO, 2024 "info: scan already aborted\n"); 2025 } 2026 } else if ((priv->scan_aborting && !priv->scan_request) || 2027 priv->scan_block) { 2028 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2029 2030 mwifiex_cancel_pending_scan_cmd(adapter); 2031 2032 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 2033 adapter->scan_processing = false; 2034 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 2035 2036 if (!adapter->active_scan_triggered) { 2037 if (priv->scan_request) { 2038 struct cfg80211_scan_info info = { 2039 .aborted = true, 2040 }; 2041 2042 mwifiex_dbg(adapter, INFO, 2043 "info: aborting scan\n"); 2044 cfg80211_scan_done(priv->scan_request, &info); 2045 priv->scan_request = NULL; 2046 priv->scan_aborting = false; 2047 } else { 2048 priv->scan_aborting = false; 2049 mwifiex_dbg(adapter, INFO, 2050 "info: scan already aborted\n"); 2051 } 2052 } 2053 } else { 2054 /* Get scan command from scan_pending_q and put to 2055 * cmd_pending_q 2056 */ 2057 cmd_node = list_first_entry(&adapter->scan_pending_q, 2058 struct cmd_ctrl_node, list); 2059 list_del(&cmd_node->list); 2060 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2061 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 2062 } 2063 2064 return; 2065 } 2066 2067 void mwifiex_cancel_scan(struct mwifiex_adapter *adapter) 2068 { 2069 struct mwifiex_private *priv; 2070 unsigned long cmd_flags; 2071 int i; 2072 2073 mwifiex_cancel_pending_scan_cmd(adapter); 2074 2075 if (adapter->scan_processing) { 2076 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags); 2077 adapter->scan_processing = false; 2078 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags); 2079 for (i = 0; i < adapter->priv_num; i++) { 2080 priv = adapter->priv[i]; 2081 if (!priv) 2082 continue; 2083 if (priv->scan_request) { 2084 struct cfg80211_scan_info info = { 2085 .aborted = true, 2086 }; 2087 2088 mwifiex_dbg(adapter, INFO, 2089 "info: aborting scan\n"); 2090 cfg80211_scan_done(priv->scan_request, &info); 2091 priv->scan_request = NULL; 2092 priv->scan_aborting = false; 2093 } 2094 } 2095 } 2096 } 2097 2098 /* 2099 * This function handles the command response of scan. 2100 * 2101 * The response buffer for the scan command has the following 2102 * memory layout: 2103 * 2104 * .-------------------------------------------------------------. 2105 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 2106 * .-------------------------------------------------------------. 2107 * | BufSize (t_u16) : sizeof the BSS Description data | 2108 * .-------------------------------------------------------------. 2109 * | NumOfSet (t_u8) : Number of BSS Descs returned | 2110 * .-------------------------------------------------------------. 2111 * | BSSDescription data (variable, size given in BufSize) | 2112 * .-------------------------------------------------------------. 2113 * | TLV data (variable, size calculated using Header->Size, | 2114 * | BufSize and sizeof the fixed fields above) | 2115 * .-------------------------------------------------------------. 2116 */ 2117 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 2118 struct host_cmd_ds_command *resp) 2119 { 2120 int ret = 0; 2121 struct mwifiex_adapter *adapter = priv->adapter; 2122 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 2123 struct mwifiex_ie_types_data *tlv_data; 2124 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 2125 u8 *bss_info; 2126 u32 scan_resp_size; 2127 u32 bytes_left; 2128 u32 idx; 2129 u32 tlv_buf_size; 2130 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 2131 struct chan_band_param_set *chan_band; 2132 u8 is_bgscan_resp; 2133 __le64 fw_tsf = 0; 2134 u8 *radio_type; 2135 struct cfg80211_wowlan_nd_match *pmatch; 2136 struct cfg80211_sched_scan_request *nd_config = NULL; 2137 2138 is_bgscan_resp = (le16_to_cpu(resp->command) 2139 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 2140 if (is_bgscan_resp) 2141 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 2142 else 2143 scan_rsp = &resp->params.scan_resp; 2144 2145 2146 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 2147 mwifiex_dbg(adapter, ERROR, 2148 "SCAN_RESP: too many AP returned (%d)\n", 2149 scan_rsp->number_of_sets); 2150 ret = -1; 2151 goto check_next_scan; 2152 } 2153 2154 /* Check csa channel expiry before parsing scan response */ 2155 mwifiex_11h_get_csa_closed_channel(priv); 2156 2157 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 2158 mwifiex_dbg(adapter, INFO, 2159 "info: SCAN_RESP: bss_descript_size %d\n", 2160 bytes_left); 2161 2162 scan_resp_size = le16_to_cpu(resp->size); 2163 2164 mwifiex_dbg(adapter, INFO, 2165 "info: SCAN_RESP: returned %d APs before parsing\n", 2166 scan_rsp->number_of_sets); 2167 2168 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 2169 2170 /* 2171 * The size of the TLV buffer is equal to the entire command response 2172 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 2173 * BSS Descriptions (bss_descript_size as bytesLef) and the command 2174 * response header (S_DS_GEN) 2175 */ 2176 tlv_buf_size = scan_resp_size - (bytes_left 2177 + sizeof(scan_rsp->bss_descript_size) 2178 + sizeof(scan_rsp->number_of_sets) 2179 + S_DS_GEN); 2180 2181 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 2182 bss_desc_and_tlv_buffer + 2183 bytes_left); 2184 2185 /* Search the TLV buffer space in the scan response for any valid 2186 TLVs */ 2187 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2188 TLV_TYPE_TSFTIMESTAMP, 2189 (struct mwifiex_ie_types_data **) 2190 &tsf_tlv); 2191 2192 /* Search the TLV buffer space in the scan response for any valid 2193 TLVs */ 2194 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2195 TLV_TYPE_CHANNELBANDLIST, 2196 (struct mwifiex_ie_types_data **) 2197 &chan_band_tlv); 2198 2199 #ifdef CONFIG_PM 2200 if (priv->wdev.wiphy->wowlan_config) 2201 nd_config = priv->wdev.wiphy->wowlan_config->nd_config; 2202 #endif 2203 2204 if (nd_config) { 2205 adapter->nd_info = 2206 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) + 2207 sizeof(struct cfg80211_wowlan_nd_match *) * 2208 scan_rsp->number_of_sets, GFP_ATOMIC); 2209 2210 if (adapter->nd_info) 2211 adapter->nd_info->n_matches = scan_rsp->number_of_sets; 2212 } 2213 2214 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 2215 /* 2216 * If the TSF TLV was appended to the scan results, save this 2217 * entry's TSF value in the fw_tsf field. It is the firmware's 2218 * TSF value at the time the beacon or probe response was 2219 * received. 2220 */ 2221 if (tsf_tlv) 2222 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 2223 sizeof(fw_tsf)); 2224 2225 if (chan_band_tlv) { 2226 chan_band = &chan_band_tlv->chan_band_param[idx]; 2227 radio_type = &chan_band->radio_type; 2228 } else { 2229 radio_type = NULL; 2230 } 2231 2232 if (chan_band_tlv && adapter->nd_info) { 2233 adapter->nd_info->matches[idx] = 2234 kzalloc(sizeof(*pmatch) + sizeof(u32), 2235 GFP_ATOMIC); 2236 2237 pmatch = adapter->nd_info->matches[idx]; 2238 2239 if (pmatch) { 2240 pmatch->n_channels = 1; 2241 pmatch->channels[0] = chan_band->chan_number; 2242 } 2243 } 2244 2245 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2246 &bytes_left, 2247 le64_to_cpu(fw_tsf), 2248 radio_type, false, 0); 2249 if (ret) 2250 goto check_next_scan; 2251 } 2252 2253 check_next_scan: 2254 mwifiex_check_next_scan_command(priv); 2255 return ret; 2256 } 2257 2258 /* 2259 * This function prepares an extended scan command to be sent to the firmware 2260 * 2261 * This uses the scan command configuration sent to the command processing 2262 * module in command preparation stage to configure a extended scan command 2263 * structure to send to firmware. 2264 */ 2265 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, 2266 struct host_cmd_ds_command *cmd, 2267 void *data_buf) 2268 { 2269 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan; 2270 struct mwifiex_scan_cmd_config *scan_cfg = data_buf; 2271 2272 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 2273 2274 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT); 2275 2276 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 2277 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved) 2278 + scan_cfg->tlv_buf_len + S_DS_GEN)); 2279 2280 return 0; 2281 } 2282 2283 /* This function prepares an background scan config command to be sent 2284 * to the firmware 2285 */ 2286 int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, 2287 struct host_cmd_ds_command *cmd, 2288 void *data_buf) 2289 { 2290 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config = 2291 &cmd->params.bg_scan_config; 2292 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf; 2293 u8 *tlv_pos = bgscan_config->tlv; 2294 u8 num_probes; 2295 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num; 2296 int i; 2297 struct mwifiex_ie_types_num_probes *num_probes_tlv; 2298 struct mwifiex_ie_types_repeat_count *repeat_count_tlv; 2299 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv; 2300 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv; 2301 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 2302 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv; 2303 struct mwifiex_chan_scan_param_set *temp_chan; 2304 2305 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG); 2306 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN); 2307 2308 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action); 2309 bgscan_config->enable = bgscan_cfg_in->enable; 2310 bgscan_config->bss_type = bgscan_cfg_in->bss_type; 2311 bgscan_config->scan_interval = 2312 cpu_to_le32(bgscan_cfg_in->scan_interval); 2313 bgscan_config->report_condition = 2314 cpu_to_le32(bgscan_cfg_in->report_condition); 2315 2316 /* stop sched scan */ 2317 if (!bgscan_config->enable) 2318 return 0; 2319 2320 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan; 2321 2322 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in-> 2323 num_probes : priv->adapter->scan_probes); 2324 2325 if (num_probes) { 2326 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos; 2327 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 2328 num_probes_tlv->header.len = 2329 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 2330 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes); 2331 2332 tlv_pos += sizeof(num_probes_tlv->header) + 2333 le16_to_cpu(num_probes_tlv->header.len); 2334 } 2335 2336 if (bgscan_cfg_in->repeat_count) { 2337 repeat_count_tlv = 2338 (struct mwifiex_ie_types_repeat_count *)tlv_pos; 2339 repeat_count_tlv->header.type = 2340 cpu_to_le16(TLV_TYPE_REPEAT_COUNT); 2341 repeat_count_tlv->header.len = 2342 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count)); 2343 repeat_count_tlv->repeat_count = 2344 cpu_to_le16(bgscan_cfg_in->repeat_count); 2345 2346 tlv_pos += sizeof(repeat_count_tlv->header) + 2347 le16_to_cpu(repeat_count_tlv->header.len); 2348 } 2349 2350 if (bgscan_cfg_in->rssi_threshold) { 2351 rssi_threshold_tlv = 2352 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos; 2353 rssi_threshold_tlv->header.type = 2354 cpu_to_le16(TLV_TYPE_RSSI_LOW); 2355 rssi_threshold_tlv->header.len = 2356 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold)); 2357 rssi_threshold_tlv->rssi_threshold = 2358 cpu_to_le16(bgscan_cfg_in->rssi_threshold); 2359 2360 tlv_pos += sizeof(rssi_threshold_tlv->header) + 2361 le16_to_cpu(rssi_threshold_tlv->header.len); 2362 } 2363 2364 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) { 2365 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len; 2366 2367 wildcard_ssid_tlv = 2368 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos; 2369 wildcard_ssid_tlv->header.type = 2370 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 2371 wildcard_ssid_tlv->header.len = cpu_to_le16( 2372 (u16)(ssid_len + sizeof(wildcard_ssid_tlv-> 2373 max_ssid_length))); 2374 2375 /* max_ssid_length = 0 tells firmware to perform 2376 * specific scan for the SSID filled, whereas 2377 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 2378 * wildcard scan. 2379 */ 2380 if (ssid_len) 2381 wildcard_ssid_tlv->max_ssid_length = 0; 2382 else 2383 wildcard_ssid_tlv->max_ssid_length = 2384 IEEE80211_MAX_SSID_LEN; 2385 2386 memcpy(wildcard_ssid_tlv->ssid, 2387 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len); 2388 2389 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 2390 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 2391 } 2392 2393 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos; 2394 2395 if (bgscan_cfg_in->chan_list[0].chan_number) { 2396 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n"); 2397 2398 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 2399 2400 for (chan_idx = 0; 2401 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && 2402 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2403 chan_idx++) { 2404 temp_chan = chan_list_tlv->chan_scan_param + chan_idx; 2405 2406 /* Increment the TLV header length by size appended */ 2407 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2408 sizeof( 2409 chan_list_tlv->chan_scan_param)); 2410 2411 temp_chan->chan_number = 2412 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2413 temp_chan->radio_type = 2414 bgscan_cfg_in->chan_list[chan_idx].radio_type; 2415 2416 scan_type = 2417 bgscan_cfg_in->chan_list[chan_idx].scan_type; 2418 2419 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 2420 temp_chan->chan_scan_mode_bitmap 2421 |= MWIFIEX_PASSIVE_SCAN; 2422 else 2423 temp_chan->chan_scan_mode_bitmap 2424 &= ~MWIFIEX_PASSIVE_SCAN; 2425 2426 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) { 2427 scan_dur = (u16)bgscan_cfg_in-> 2428 chan_list[chan_idx].scan_time; 2429 } else { 2430 scan_dur = (scan_type == 2431 MWIFIEX_SCAN_TYPE_PASSIVE) ? 2432 priv->adapter->passive_scan_time : 2433 priv->adapter->specific_scan_time; 2434 } 2435 2436 temp_chan->min_scan_time = cpu_to_le16(scan_dur); 2437 temp_chan->max_scan_time = cpu_to_le16(scan_dur); 2438 } 2439 } else { 2440 dev_dbg(priv->adapter->dev, 2441 "info: bgscan: Creating full region channel list\n"); 2442 chan_num = 2443 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in, 2444 chan_list_tlv-> 2445 chan_scan_param); 2446 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2447 chan_num * 2448 sizeof(chan_list_tlv->chan_scan_param[0])); 2449 } 2450 2451 tlv_pos += (sizeof(chan_list_tlv->header) 2452 + le16_to_cpu(chan_list_tlv->header.len)); 2453 2454 if (bgscan_cfg_in->start_later) { 2455 start_later_tlv = 2456 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos; 2457 start_later_tlv->header.type = 2458 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER); 2459 start_later_tlv->header.len = 2460 cpu_to_le16(sizeof(start_later_tlv->start_later)); 2461 start_later_tlv->start_later = 2462 cpu_to_le16(bgscan_cfg_in->start_later); 2463 2464 tlv_pos += sizeof(start_later_tlv->header) + 2465 le16_to_cpu(start_later_tlv->header.len); 2466 } 2467 2468 /* Append vendor specific IE TLV */ 2469 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos); 2470 2471 le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv); 2472 2473 return 0; 2474 } 2475 2476 int mwifiex_stop_bg_scan(struct mwifiex_private *priv) 2477 { 2478 struct mwifiex_bg_scan_cfg *bgscan_cfg; 2479 2480 if (!priv->sched_scanning) { 2481 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n"); 2482 return 0; 2483 } 2484 2485 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL); 2486 if (!bgscan_cfg) 2487 return -ENOMEM; 2488 2489 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA; 2490 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET; 2491 bgscan_cfg->enable = false; 2492 2493 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG, 2494 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) { 2495 kfree(bgscan_cfg); 2496 return -EFAULT; 2497 } 2498 2499 kfree(bgscan_cfg); 2500 priv->sched_scanning = false; 2501 2502 return 0; 2503 } 2504 2505 static void 2506 mwifiex_update_chan_statistics(struct mwifiex_private *priv, 2507 struct mwifiex_ietypes_chanstats *tlv_stat) 2508 { 2509 struct mwifiex_adapter *adapter = priv->adapter; 2510 u8 i, num_chan; 2511 struct mwifiex_fw_chan_stats *fw_chan_stats; 2512 struct mwifiex_chan_stats chan_stats; 2513 2514 fw_chan_stats = (void *)((u8 *)tlv_stat + 2515 sizeof(struct mwifiex_ie_types_header)); 2516 num_chan = le16_to_cpu(tlv_stat->header.len) / 2517 sizeof(struct mwifiex_chan_stats); 2518 2519 for (i = 0 ; i < num_chan; i++) { 2520 if (adapter->survey_idx >= adapter->num_in_chan_stats) { 2521 mwifiex_dbg(adapter, WARN, 2522 "FW reported too many channel results (max %d)\n", 2523 adapter->num_in_chan_stats); 2524 return; 2525 } 2526 chan_stats.chan_num = fw_chan_stats->chan_num; 2527 chan_stats.bandcfg = fw_chan_stats->bandcfg; 2528 chan_stats.flags = fw_chan_stats->flags; 2529 chan_stats.noise = fw_chan_stats->noise; 2530 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss); 2531 chan_stats.cca_scan_dur = 2532 le16_to_cpu(fw_chan_stats->cca_scan_dur); 2533 chan_stats.cca_busy_dur = 2534 le16_to_cpu(fw_chan_stats->cca_busy_dur); 2535 mwifiex_dbg(adapter, INFO, 2536 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n", 2537 chan_stats.chan_num, 2538 chan_stats.noise, 2539 chan_stats.total_bss, 2540 chan_stats.cca_scan_dur, 2541 chan_stats.cca_busy_dur); 2542 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats, 2543 sizeof(struct mwifiex_chan_stats)); 2544 fw_chan_stats++; 2545 } 2546 } 2547 2548 /* This function handles the command response of extended scan */ 2549 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, 2550 struct host_cmd_ds_command *resp) 2551 { 2552 struct mwifiex_adapter *adapter = priv->adapter; 2553 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp; 2554 struct mwifiex_ie_types_header *tlv; 2555 struct mwifiex_ietypes_chanstats *tlv_stat; 2556 u16 buf_left, type, len; 2557 2558 struct host_cmd_ds_command *cmd_ptr; 2559 struct cmd_ctrl_node *cmd_node; 2560 unsigned long cmd_flags, scan_flags; 2561 bool complete_scan = false; 2562 2563 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n"); 2564 2565 ext_scan_resp = &resp->params.ext_scan; 2566 2567 tlv = (void *)ext_scan_resp->tlv_buffer; 2568 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN 2569 - 1); 2570 2571 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { 2572 type = le16_to_cpu(tlv->type); 2573 len = le16_to_cpu(tlv->len); 2574 2575 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) { 2576 mwifiex_dbg(adapter, ERROR, 2577 "error processing scan response TLVs"); 2578 break; 2579 } 2580 2581 switch (type) { 2582 case TLV_TYPE_CHANNEL_STATS: 2583 tlv_stat = (void *)tlv; 2584 mwifiex_update_chan_statistics(priv, tlv_stat); 2585 break; 2586 default: 2587 break; 2588 } 2589 2590 buf_left -= len + sizeof(struct mwifiex_ie_types_header); 2591 tlv = (void *)((u8 *)tlv + len + 2592 sizeof(struct mwifiex_ie_types_header)); 2593 } 2594 2595 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags); 2596 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags); 2597 if (list_empty(&adapter->scan_pending_q)) { 2598 complete_scan = true; 2599 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { 2600 cmd_ptr = (void *)cmd_node->cmd_skb->data; 2601 if (le16_to_cpu(cmd_ptr->command) == 2602 HostCmd_CMD_802_11_SCAN_EXT) { 2603 mwifiex_dbg(adapter, INFO, 2604 "Scan pending in command pending list"); 2605 complete_scan = false; 2606 break; 2607 } 2608 } 2609 } 2610 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags); 2611 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags); 2612 2613 if (complete_scan) 2614 mwifiex_complete_scan(priv); 2615 2616 return 0; 2617 } 2618 2619 /* This function This function handles the event extended scan report. It 2620 * parses extended scan results and informs to cfg80211 stack. 2621 */ 2622 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv, 2623 void *buf) 2624 { 2625 int ret = 0; 2626 struct mwifiex_adapter *adapter = priv->adapter; 2627 u8 *bss_info; 2628 u32 bytes_left, bytes_left_for_tlv, idx; 2629 u16 type, len; 2630 struct mwifiex_ie_types_data *tlv; 2631 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv; 2632 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv; 2633 u8 *radio_type; 2634 u64 fw_tsf = 0; 2635 s32 rssi = 0; 2636 struct mwifiex_event_scan_result *event_scan = buf; 2637 u8 num_of_set = event_scan->num_of_set; 2638 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result); 2639 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size); 2640 2641 if (num_of_set > MWIFIEX_MAX_AP) { 2642 mwifiex_dbg(adapter, ERROR, 2643 "EXT_SCAN: Invalid number of AP returned (%d)!!\n", 2644 num_of_set); 2645 ret = -1; 2646 goto check_next_scan; 2647 } 2648 2649 bytes_left = scan_resp_size; 2650 mwifiex_dbg(adapter, INFO, 2651 "EXT_SCAN: size %d, returned %d APs...", 2652 scan_resp_size, num_of_set); 2653 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf, 2654 scan_resp_size + 2655 sizeof(struct mwifiex_event_scan_result)); 2656 2657 tlv = (struct mwifiex_ie_types_data *)scan_resp; 2658 2659 for (idx = 0; idx < num_of_set && bytes_left; idx++) { 2660 type = le16_to_cpu(tlv->header.type); 2661 len = le16_to_cpu(tlv->header.len); 2662 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) { 2663 mwifiex_dbg(adapter, ERROR, 2664 "EXT_SCAN: Error bytes left < TLV length\n"); 2665 break; 2666 } 2667 scan_rsp_tlv = NULL; 2668 scan_info_tlv = NULL; 2669 bytes_left_for_tlv = bytes_left; 2670 2671 /* BSS response TLV with beacon or probe response buffer 2672 * at the initial position of each descriptor 2673 */ 2674 if (type != TLV_TYPE_BSS_SCAN_RSP) 2675 break; 2676 2677 bss_info = (u8 *)tlv; 2678 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv; 2679 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2680 bytes_left_for_tlv -= 2681 (len + sizeof(struct mwifiex_ie_types_header)); 2682 2683 while (bytes_left_for_tlv >= 2684 sizeof(struct mwifiex_ie_types_header) && 2685 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) { 2686 type = le16_to_cpu(tlv->header.type); 2687 len = le16_to_cpu(tlv->header.len); 2688 if (bytes_left_for_tlv < 2689 sizeof(struct mwifiex_ie_types_header) + len) { 2690 mwifiex_dbg(adapter, ERROR, 2691 "EXT_SCAN: Error in processing TLV,\t" 2692 "bytes left < TLV length\n"); 2693 scan_rsp_tlv = NULL; 2694 bytes_left_for_tlv = 0; 2695 continue; 2696 } 2697 switch (type) { 2698 case TLV_TYPE_BSS_SCAN_INFO: 2699 scan_info_tlv = 2700 (struct mwifiex_ie_types_bss_scan_info *)tlv; 2701 if (len != 2702 sizeof(struct mwifiex_ie_types_bss_scan_info) - 2703 sizeof(struct mwifiex_ie_types_header)) { 2704 bytes_left_for_tlv = 0; 2705 continue; 2706 } 2707 break; 2708 default: 2709 break; 2710 } 2711 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2712 bytes_left -= 2713 (len + sizeof(struct mwifiex_ie_types_header)); 2714 bytes_left_for_tlv -= 2715 (len + sizeof(struct mwifiex_ie_types_header)); 2716 } 2717 2718 if (!scan_rsp_tlv) 2719 break; 2720 2721 /* Advance pointer to the beacon buffer length and 2722 * update the bytes count so that the function 2723 * wlan_interpret_bss_desc_with_ie() can handle the 2724 * scan buffer withut any change 2725 */ 2726 bss_info += sizeof(u16); 2727 bytes_left -= sizeof(u16); 2728 2729 if (scan_info_tlv) { 2730 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi)); 2731 rssi *= 100; /* Convert dBm to mBm */ 2732 mwifiex_dbg(adapter, INFO, 2733 "info: InterpretIE: RSSI=%d\n", rssi); 2734 fw_tsf = le64_to_cpu(scan_info_tlv->tsf); 2735 radio_type = &scan_info_tlv->radio_type; 2736 } else { 2737 radio_type = NULL; 2738 } 2739 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2740 &bytes_left, fw_tsf, 2741 radio_type, true, rssi); 2742 if (ret) 2743 goto check_next_scan; 2744 } 2745 2746 check_next_scan: 2747 if (!event_scan->more_event) 2748 mwifiex_check_next_scan_command(priv); 2749 2750 return ret; 2751 } 2752 2753 /* 2754 * This function prepares command for background scan query. 2755 * 2756 * Preparation includes - 2757 * - Setting command ID and proper size 2758 * - Setting background scan flush parameter 2759 * - Ensuring correct endian-ness 2760 */ 2761 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 2762 { 2763 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 2764 &cmd->params.bg_scan_query; 2765 2766 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 2767 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 2768 + S_DS_GEN); 2769 2770 bg_query->flush = 1; 2771 2772 return 0; 2773 } 2774 2775 /* 2776 * This function inserts scan command node to the scan pending queue. 2777 */ 2778 void 2779 mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 2780 struct cmd_ctrl_node *cmd_node) 2781 { 2782 struct mwifiex_adapter *adapter = priv->adapter; 2783 unsigned long flags; 2784 2785 cmd_node->wait_q_enabled = true; 2786 cmd_node->condition = &adapter->scan_wait_q_woken; 2787 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 2788 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 2789 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2790 } 2791 2792 /* 2793 * This function sends a scan command for all available channels to the 2794 * firmware, filtered on a specific SSID. 2795 */ 2796 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 2797 struct cfg80211_ssid *req_ssid) 2798 { 2799 struct mwifiex_adapter *adapter = priv->adapter; 2800 int ret; 2801 struct mwifiex_user_scan_cfg *scan_cfg; 2802 2803 if (adapter->scan_processing) { 2804 mwifiex_dbg(adapter, WARN, 2805 "cmd: Scan already in process...\n"); 2806 return -EBUSY; 2807 } 2808 2809 if (priv->scan_block) { 2810 mwifiex_dbg(adapter, WARN, 2811 "cmd: Scan is blocked during association...\n"); 2812 return -EBUSY; 2813 } 2814 2815 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 2816 if (!scan_cfg) 2817 return -ENOMEM; 2818 2819 scan_cfg->ssid_list = req_ssid; 2820 scan_cfg->num_ssids = 1; 2821 2822 ret = mwifiex_scan_networks(priv, scan_cfg); 2823 2824 kfree(scan_cfg); 2825 return ret; 2826 } 2827 2828 /* 2829 * Sends IOCTL request to start a scan. 2830 * 2831 * This function allocates the IOCTL request buffer, fills it 2832 * with requisite parameters and calls the IOCTL handler. 2833 * 2834 * Scan command can be issued for both normal scan and specific SSID 2835 * scan, depending upon whether an SSID is provided or not. 2836 */ 2837 int mwifiex_request_scan(struct mwifiex_private *priv, 2838 struct cfg80211_ssid *req_ssid) 2839 { 2840 int ret; 2841 2842 if (mutex_lock_interruptible(&priv->async_mutex)) { 2843 mwifiex_dbg(priv->adapter, ERROR, 2844 "%s: acquire semaphore fail\n", 2845 __func__); 2846 return -1; 2847 } 2848 2849 priv->adapter->scan_wait_q_woken = false; 2850 2851 if (req_ssid && req_ssid->ssid_len != 0) 2852 /* Specific SSID scan */ 2853 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 2854 else 2855 /* Normal scan */ 2856 ret = mwifiex_scan_networks(priv, NULL); 2857 2858 mutex_unlock(&priv->async_mutex); 2859 2860 return ret; 2861 } 2862 2863 /* 2864 * This function appends the vendor specific IE TLV to a buffer. 2865 */ 2866 int 2867 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 2868 u16 vsie_mask, u8 **buffer) 2869 { 2870 int id, ret_len = 0; 2871 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 2872 2873 if (!buffer) 2874 return 0; 2875 if (!(*buffer)) 2876 return 0; 2877 2878 /* 2879 * Traverse through the saved vendor specific IE array and append 2880 * the selected(scan/assoc/adhoc) IE as TLV to the command 2881 */ 2882 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 2883 if (priv->vs_ie[id].mask & vsie_mask) { 2884 vs_param_set = 2885 (struct mwifiex_ie_types_vendor_param_set *) 2886 *buffer; 2887 vs_param_set->header.type = 2888 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 2889 vs_param_set->header.len = 2890 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 2891 & 0x00FF) + 2); 2892 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 2893 le16_to_cpu(vs_param_set->header.len)); 2894 *buffer += le16_to_cpu(vs_param_set->header.len) + 2895 sizeof(struct mwifiex_ie_types_header); 2896 ret_len += le16_to_cpu(vs_param_set->header.len) + 2897 sizeof(struct mwifiex_ie_types_header); 2898 } 2899 } 2900 return ret_len; 2901 } 2902 2903 /* 2904 * This function saves a beacon buffer of the current BSS descriptor. 2905 * 2906 * The current beacon buffer is saved so that it can be restored in the 2907 * following cases that makes the beacon buffer not to contain the current 2908 * ssid's beacon buffer. 2909 * - The current ssid was not found somehow in the last scan. 2910 * - The current ssid was the last entry of the scan table and overloaded. 2911 */ 2912 void 2913 mwifiex_save_curr_bcn(struct mwifiex_private *priv) 2914 { 2915 struct mwifiex_bssdescriptor *curr_bss = 2916 &priv->curr_bss_params.bss_descriptor; 2917 2918 if (!curr_bss->beacon_buf_size) 2919 return; 2920 2921 /* allocate beacon buffer at 1st time; or if it's size has changed */ 2922 if (!priv->curr_bcn_buf || 2923 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 2924 priv->curr_bcn_size = curr_bss->beacon_buf_size; 2925 2926 kfree(priv->curr_bcn_buf); 2927 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 2928 GFP_ATOMIC); 2929 if (!priv->curr_bcn_buf) 2930 return; 2931 } 2932 2933 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 2934 curr_bss->beacon_buf_size); 2935 mwifiex_dbg(priv->adapter, INFO, 2936 "info: current beacon saved %d\n", 2937 priv->curr_bcn_size); 2938 2939 curr_bss->beacon_buf = priv->curr_bcn_buf; 2940 2941 /* adjust the pointers in the current BSS descriptor */ 2942 if (curr_bss->bcn_wpa_ie) 2943 curr_bss->bcn_wpa_ie = 2944 (struct ieee_types_vendor_specific *) 2945 (curr_bss->beacon_buf + 2946 curr_bss->wpa_offset); 2947 2948 if (curr_bss->bcn_rsn_ie) 2949 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2950 (curr_bss->beacon_buf + 2951 curr_bss->rsn_offset); 2952 2953 if (curr_bss->bcn_ht_cap) 2954 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2955 (curr_bss->beacon_buf + 2956 curr_bss->ht_cap_offset); 2957 2958 if (curr_bss->bcn_ht_oper) 2959 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *) 2960 (curr_bss->beacon_buf + 2961 curr_bss->ht_info_offset); 2962 2963 if (curr_bss->bcn_vht_cap) 2964 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf + 2965 curr_bss->vht_cap_offset); 2966 2967 if (curr_bss->bcn_vht_oper) 2968 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf + 2969 curr_bss->vht_info_offset); 2970 2971 if (curr_bss->bcn_bss_co_2040) 2972 curr_bss->bcn_bss_co_2040 = 2973 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset); 2974 2975 if (curr_bss->bcn_ext_cap) 2976 curr_bss->bcn_ext_cap = curr_bss->beacon_buf + 2977 curr_bss->ext_cap_offset; 2978 2979 if (curr_bss->oper_mode) 2980 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf + 2981 curr_bss->oper_mode_offset); 2982 } 2983 2984 /* 2985 * This function frees the current BSS descriptor beacon buffer. 2986 */ 2987 void 2988 mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2989 { 2990 kfree(priv->curr_bcn_buf); 2991 priv->curr_bcn_buf = NULL; 2992 } 2993